Pressure regulated motor valve



April 6, 1954 J. H. M CARVELL PRESSURE REGULATED MOTOR VALVE Filed Nov. 1'7, 1950 JOHN H W CARVEL INVENTOR.

BY 6p ATTORN EY,

Patented Apr. 6, 1954 UNITED STATES PATENT 'O'FFlCE PRESSURE REGULATED MOTOR; VALVE r John Henry" McCarvell, Houston, Tex; assignor --to-'Macco0il Tool Company, Houston, Tex., a

.. partnership "Application November 17, 1950, Serial No.11'96,301 l 3 Glaims. 1

: Thexinvention relatesto what is generally des- "ignated' in 'the artas a motor valve because'of its powerpperation by the pressure fluid, the flow of which is controll'edby the valve in a well flowing system for' wells.

Where a well has been completed and may be liquids, such as oil and/or water, to the surface.

The present invention, therefore, relates enerally'to that shown anddescribed in the prior Patent 2,339,487 t William'R. King, January 18, 1944. The motor valve is shown at 35 in the drawing of such patent and maybe designated as a fpower' valve."

Generally, such valve is connected to a source of fluid pressure, the flow of which into the well .is controlled by'the valve in order to utilize a minimumamount of such pressure fluid and to efiec'tthe maximum flo'wing'of'oilfrom the well.

The present invention is in the nature of an improvement: 'which' embodies an arrangement whereby when the pressure fluid is by-passed :fromtheimain supply line to thecontrol regulator it is conducted through a condensation chamher so that any moisture in the pressure fluid, or carried thereby, would be condensed and permitted to drip back into the main line and prevent any interference thereof of the motor valve.

It is one of the objects of the invention to provide a motor valve in which a condensation chamber is arranged about its valve stem so as to permit the condensation of moisture therein from the fluid in the operation of the valve.

Still another object of the invention is to provide a motor valve having an enlarged cylindrical sleeve disposed around the valve stem and its yoke support and extending about the valve housing and a diaphragm unit to control the operation of the valve.

A still further object is to provide the combination of a motor control valve carrying a bypass from the fluid pressure being valved so as to provide a pressure fluid whose flow to a diaphragm unit for control of the motor valve is determined by a mechanical intermitter time regulator.

Other and still further objects of the invention will be readily apparent when considered in connection with the accompanying drawing, wherein the single view is a-vertical section of the valve by-pass diaphragm unit and the connections therefor.

The valve generally isdesignated by the housing 2 which is connected by the thread 3 to a source of high pressurefluid. The opposite end 4 of such housing is connected at 5 to a low pressure line leading into the well for the flow of pressure fluid.

A barrier, or partition, 1 divides the inlet high pressure end from the low pressure end 5 and has an opening 8 therethrough in which a liner H) has been disposed. Suitable seals H insure the sealingof the liner Ii] in the partition 1.

A valve'seat I4 is disposed in the liner and is arranged to be engaged by a valve member l5 which is vertically slidable in the liner ill by meansof the stemlfi. Aport H in this liner is closed or-opened by the raising or lowering of the valve-15 by the stem 16.

The liner l-D ishollow toreceive the valve IS in the valve chamber [8 thereof. Seal rings l9form a sealbetween the valve and the liner.

' The liner has a'lateral flange 2| which abuts against the extension 22 of-thehousing and is sealed thereon by the seal rings 23.

A yoke 25 is shown as abuttin the flan e 2| and extending upward about the stem 16 so s to serve'as a support for a diaphragm unit 38 which is connected on the upward end. It.

The diaphragm unit has the housing 3| made up of the upper and lower portions in order to clamp the diaphragm 32 therebetween. The upper end of the stem l6 has an enlarged flange 34 which bears against the diaphragm so as to provide sufflcient power upon the diaphragm to move the valve when a pressure fluid is introduced into the chamber 36 in the diaphragm housing above the diaphragm 32.

The high pressure end of the housing abuts the lower end of the Valve [5 and tends to raise or open the valve. This tendency is overcome by the pressure against the diaphragm and the valve stem in the chamber 36 and the diaphragm unit 30.

While the invention has been described as applied to a power valve, it seems obvious that the condensation and drip chamber may be incorporated in a regulator supply line regardless of the type of valve.

In operation the pressure fluid will be admitted to the well in order to actuate the valves in the flowin operation. When, however, such pressure introduced to the well builds up to a predetermined value, such pressure will build up in the low pressure side of the housing. A conduit 40 is shown as extending from the flow passage through the valve, through the housing, through the liner 2|, and into a chamber 4| which will be designated as a condensation chamber. chamber is created by a sleeve 42 which extends from the liner to the diaphragm unit so as to provide a cylindrical annulus about the yoke 25.

This pressure fluid is then passed through a pipe 43, a reducer valve 44, and thence into a time 1 control intermitter regulator 45 which is illustrated merely generally. This regulator, in turn, is connected by the nippl 46 into the chamber 36 of the diaphragm unit 30. This regulator 45 may take any desired form and may be that of 1 the King patent aforesaid, or various other forms which are on the market and valuable to the industry as that manufactured by the Fisher Governor Company, Marshall, Iowa, and illustrated in the Fisher Time Cycle Intermitters, Series 4500. 2

It should be apparent from the foregoing that the pressure fluid mayaccumulate under a pressur in the condensation chamber 4| and moisture carried by the pressure fluid will tend to con dense for obvious reasons so that a liquid may 2 tend to accumulate in the base of the chamber 41. This liquid will drip back into the main line and the housing 2 through the conduit 48 so as to remove such moisture from the regulator and diaphragm to avoid the accumulation thereof 3 and the interference with the operation of the device. When such pressure builds up, the regulator 45 will admit pressure fiuid and effect a closing of the motor valve, Whereas, when such admitted pressure is dissipated in the well, then 3 there will be a reduction of the pressure in the drip chamber. A re-opening of the main valve 15 may then occur because of the high pressure This 5 member slidable therein to open and close said 50 passage, a stem to actuate said valve, 9. seal about said valve in said chamber, fluid pressure means to control the movement of said stem. a condensation housing about said stem, a drip chamber therein, conduit from said passage beyond said valve into said drip chamber, and through which the fluid pressure to actuate said means must flow whereby condensate drips back into the flow passage. v

2. A motor valve for controlling the flow of pressure fluid from a source to a well and comprising a housing, a valve stem extending therefrom, a yoke supporting said stem, a diaphragm unit on said yoke, a drip chamber for pressure fluid condensate including a sleeve extending from said housing to said unit, a conduit through said housing into said sleeve, and a connection from said sleeve around said diaphragm whereby condensate of pressure fluid may drip back into said housing.

3. A motor valve comprising a housing, a flow passage, a valve member toclose said passage, a valve stem, a yoke to support said stem, a diaphragm unit on said yoke and connected to actuate said stem, a bypass from said housing around said unit for a flow of pressure fluid from the down stream side of said valve, a pressure regulator device in said bypass operable to control the operation of said valve by the periodic admission of pressure fluid to said diaphragm, and a condensate drip chamber including a sleeve about said yoke as a portion of said bypass so that the condensate may drip back into said housing.

References Cited in the file of this patent UNITED STATES PATENTS 

